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I think there is more that needs to be done in the method than display the balance.
Make a list of the steps that the method should do.
When that list is finished, try writing the code to do the...

Ok. Do you know the details of what each of those methods needs to do? For example: should the user's balance be checked and changed?

Can you describe what those methods are supposed to do? Their names give a simple definition, but what else would the methods need to do?
What does "instantMoney" mean?